Several 3Ls believe it is according to this story from the Business Insider. They'd rather use the third year to learn practical legal skills than take electives like "law and literature" or "lawyering and biography."

A recent graduate of the University of Missouri law school, Rita
Flórez says a third year of classes is "like watching paint dry" after
two years of course work. "You get to 3L and you're just like, why I am
here?" she said. "I had a lot of classmates who skipped frequently."

During the first two years, law students take meaty courses like
CivPro (the rules lawyers have to follow during civil lawsuits),
contracts, and legal ethics.

By the time she got to the third year, Flórez says, she wanted to
continue developing her legal skills instead of taking electives, like law and literature and lawyering and biography that third year. Many of the students in her cohort developed senioritis, she says.